Paper crinkling



, 1,582,840 w. A. LORENZ PAPER CRINKLING Filed Nov. 5. 1920 2Sheets-Sheet 1 Invenz/or: WZZZz'aznAZo renz g g m April 27 1926.

W. A. LORENZ PAPER CRINKLING Filed Nov. 5, 1920 2 Sheets-Sheet 2 h a l 7e L U n A r w mm h MNW Z Patented Apr. 27,

UNITED srn Es PATENT OFFICE.

WILLIAM A. LORENZ, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE OTAKAFABRIC COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF CONNECTICUT.

rerun onmxnrno'.

App1ication filed November 5, 1920. Serial No. 422,006.

Toall whom'z't ooncemf 4 Be it known that I, 'WILLIAMA. LORE Z,

' a citizen of the United States, residing in p more set.

. State of. Connecticut,

train new and useful Improvements in Paper H.artford,iin the count ofHartford and ave invented oer- C rinkling, of which the following is aspecification. v This invention relates to means for corrugating paper,and also to means for crin ling the paper crosswise of the corrugationstherein. longitudinallyfof the .web and are comparatively deep, and itis one of the main objects of the invention-to produce these corru'gations without repturing or unduly weaken in'g'the paper, even though thewidth of the corrugated web remains about-the'same as that of the web inits original condition.

In effecting the foregoing improvement, no devices are used forpreliminaril. athering the web widthwise into flutes,- ut the contour orform. The paper may then be subjected to one or more additionalcorrugating actions, by athe use of additional grooved rolls, (all ofthe rolls having the same pitch), so that finally the paper is broughtto the desired corrugated condition, the corrugations being preferablydeepened as the paper passes between the rolls in each pair, and at eachstep becoming firmer and Preferably heat is employed, partlyfor thepurpose of diffusing the moisture more thoroughly throughout the sheet,for preparing it for subsequent corrugatin pressure. The heat niay beapplied by at least two oorrugating cylinders, and the paper eventuallypreferably becomes dry, or at least warm,-- while still passing over thecorrugating rolls. The final roll in the set is used for the purpose ofdriving: the

corrugated proper against a doctor-blade,- thereby c'rin hug the paperin transverse lines.

gated.

' Another feature of the invention relates a The corrugations extendtoeiiecting variations in the crinkling, givingalternate bands of deep andshallow erinkles, thereby producing an ornamental configuration orpattern of crinkling, and sccuring other advantages. This result issecured by controlling the roll which runs upon the corrugatedweb'inproximity to the doctor-blade to aid in crushing the web againstthe blade. The roll is made to move to and fro regularly, away from andtowardsthe doctor-blade, whereby the desired variation in the. crinklingis produced.

When the roll is c'losefto the blade,- the erinkles are accentuated anddeep, while when the roll is remote from the blade, the

crinkles areless marked and shallow. Other features and advantages willhereinafter appear.

In the accompanyingdrawings, Figure 1 is a plan ofan apparatus embodying several features f the invention above referred to in one form.

Figure 2 is a sectional side elevation taken at about the line 2E2 ofFigure -1.- I

The rotation of a supp y roll 10 of paper is retarded by a'weightedstra" 11. 'roni this roll the web 12' may be Is up over an introductoryroll 13 to a moistening appareltus'eoinprising two rolls 14, 15, overwhich the web runs in succession to expose its opposite sides tothewater, which is applied thereto by rolls 16,- 17. Said rolls 16,- .17take up thewater from distributing rolls 18', which are immersed inwaterla contained in troughs or tanksao, supplied by pipes 21 and1yire-rider]! with overflow" pi es Each rol 18 is mounted uponan'eceentric 23, to adjust it to the rightrelation to the companionrolls 1'6,- 1 7'.- Each of the latter is mounted by means" of arms upona rockshaft 25, from which extend horizontal arms .26,- carryiiigadjustable weights 2 7, to regu late the pressure of the moistening'rolls 16,

17 against the paper. a

A age 18% may be emplo ed to exten'd to the immersed roll 18, to granote the amount.

of water which said roll 'icks ap end dis- I tributes to the wetting re]s 16 and 17.

From the wetting apparatus, the. web is led at 27= to a longitudinallyeorrugating or inders or rolls 2'8, 29, 30" and 31, all havinginter-meshing peripheral grooves 32', for roll ing the corrugations intothe web. The gear flirting set,- omprising power-driven cyl-" gears 36and 37 being fixed to the cylinders or drums 30, 29. For operating thewetting gatin rolls without the preliminary gather- Y '7 I paper.

roll 16, an idle pinion 40 is driven by gear 37 and drives a pinion 41connected with said wetting roll. The companion roll 18 has apinion 42in mesh with a pinion 43' fixed on the shaft of said roll 16. Said gear37 also meshes with a pinion 44 on the cyl- I inder 28, and 4A mesheswith an idle pinion 45 engaging a pinion 46 on the-shaft of wet-.

ting roll 17. On said shaft is a pinion 47 to mesh with a pinion 48 onthe shaft of its companion roll 18.

It will be understood that the paper is made quite wet in order topermit it to be advanced at once to'the bite of the corruing 0 the paperinto a fluted condition." If the paper 1s very absorbent, the describedaddition of the water thereto expands the performed without subjectinunduestrain, particularly i the corruga tions are relatively broad andshallow. -When paper is used that less readily absorbs water, it wouldbenecessary to subject it more thoroughly to, the dampening action, partlyin order to expand it as much as possible, and-also to render itslightly plastic or flexible before running it into the corrugatingrolls.

- The paper is sufilciently moistened and softened by the describedwetting apparatus 46 to enable its fibres to yield readily to the"fluting action of the rolls 28 and 29, which form the paper intocorrugations and incidentall stretch the paper widthwise, and hence thenecessity of a preliminary gathering of the web into a fluted conditionbefore entering therolls may be avoided, the corrugations beingimpressed in the paper without the latter losing in width.

.Some kinds of paper need to be. wetted only. to a slight extent, and inthat case' the wetting may be performed by steam or by finely atomizedwater.

The paper 13 maintained in its corrugated condition as it is drawnaround the second revolving cylinder 29,.and is further rolled orpressed between the latter and a third cylinder 30, thereby tending. todeepen the corru ations and compactthe paper in its lateral This efl ectupon the paper is increased by its being drawn tightly upon therevolving grooved cylinder 30, the latter furthermore co-operating withthe fourth grooved cylinder 31 to improve and perfect the corrugatin ofthe sheet.

e cylinder 29 is preferably in the form .This allows the corrugating tobe.

the paper tostretched corrugated condition.

of a large drum, since it ima'y be used for it into better condition forsubsequent action by the corrugating rolls. The paper, moreover, bybecoming heated has its subsequent dryi'n action facilitated orhastened. The cylin er 30 is also usedas a heating drum, beingsuppliedby a-steam pipe 50,'thi's c l inder augmenting the heating effect and aso tending to dry out the paper;

The number of cylinders over which the paperis passed in order to rollit and'dry "it to the extentdesired, may be varied. 'It is preferred towet the paper sufficiently to corruga-te it without subjecting-it toundue strain, and then to dry it partially or even render itsubstantially d by the timeit reaches the hereinafterescribeddoctorblade for crinkling, .so that the paper at that-juncture will bewarm, so as to set the paper inits crinkled condition.

It'will be understood that'the corrugation of the paper tends to stiffenit, so'that it resists b'eing bent to and fro around the cylinders 29,30, 31,.being bent first in one direction and then in the oppositedirection,

and then back to the'first direction. For

.both said cylinders, to hold the corrugated web thereagainst. Thisendless belt is designated as 51, and 'runsfrom the introductory side tothe delivery side of the cylinder, and thenofi and around rolls 52, 53and 54 to the introductory side again. The roll or pulley 53 ma be usedfor tightening the belt, and for t is purpose it may be mounted upon-anadjustab e arm 55. The belts hold the corrugatedweb to the-cylinders,or,-in other words co-o erate with the cylinders to perform the desiredwork u n the paper, an also conduce to the better ieating of the paper,inasmuch as it is kept in close contact with the heated surfaces of thedrums. Evaporation takes place between the cylinder and. the beitwwiththe result that the paper is wetted on both sides more thoroughly. Thebelt also causes the paper to absorb the moisture more thoroughly wheredouble-ply --pa er or superposed webs are passed throng the machine.Pulley 52 is driven by a gear 5 6 meshing with 35; and pulley 54: by apinion 57' meshing'wi-th 36.

It will be understood that by the time the web has begun to advancearound the cylinder 31, it iswell compacted and heated;- and, ifdesired, this cylinder 31 may also be supplied with heating means (notshown). A grooved pressure roll 58 also co-operates with the grooveddrum 31, said roll mesh-' ing with the drum and being placed at thedelivery part thereof, and being power- I driven by means of a. pinion59 meshing with gear 35. This roll tends to draw the roll tightly to theperiphery of the drum 31, and hence to overcome the stiffening orstraightening tendency of the web, due to its fluted condition andarising partly from the bending of the web in a reverse direction fromits bend around cylinder 30.

The roll 58 not only holds the web around cylinder 31 and co-operateswith said cylinder in giving the final roll to the corrugations in theweb, but also aids the cylinder in pressing the web against a stationarydoctor-blade 60, which is fixed upon a crossbar 61 mountedupon themachine frame 62, and is corrugated or grooved to fit the corrugationsin the drum. By the co-operation of the rolls 31 and'58 and thedoctor-blade, the paper is crinkled and passes at 63 onto a deliverybelt 64.

To vary the sharpness and depth of thecrinkling, the roll 58 may bemounted-upon adjustable arms 65, whereby the position of the rollrelatively to the doctor-blade may be varied. By adjusting the rollcloser to the blade, the space between the roll and the blade is reducedso as to increase "the difliculty of the paper in passing between" them,and, owing to this added resistance, the

aper becomes more crushed, or the crinking becomes sharper and deeper;and by adjusting the roll away from the blade the opposite efi'ect maybe produced. The arms 65 are preferably mounted upon an axle 66 of thecylinder 31, so that the roll 58 will always retain its properrelationship to the surface of the drum 31.

In order to produce adjustment or move ment of'the roll- 58 atpredetermined intervals, so as to secure a regular variation in thecharacteristics of the crinkling and thereby produce an ornamentalconfiguration of the product, the arms 65 may be oscillated by means ofa revolving eccentric cal 67, upon which runs a roll 68, carried uponthe end of an arm 69, which is rigid with arms 65. The cam may berotated by means of an idle pinion 70, meshing with gear and driving ainion 71, which is connected to the shaft 2 of the eccentric cam.Therefore, once in each revolution of i shaft 7 2, the roll 58 is givena complete oscillation, a spring 73 serving to swing the roll away fromthe doctor-blade after the eccentric cam has forced the roll towardssaid blade. It will be understood, however, that roll 58 need not bemade adjustable, either mechanically or otherwise in all cases.

Variations may be resorted to within the scope of the invention, andportions of the improvements may be used without others.

' heating means.

2. The combinationof means for support ing a web of paper in the form ofa supply roll, a pair of longitudinally corrugating rolls to which thepaper is directly led from the supply roll, and means between the sup--ply roll and the corrugating rolls for Wetting the paper sufliciently tocause it to become plastic and stretchable, said rolls forming part of aset of pairs of corrugating 'rolls through which the paper is led, oneof the rolls in said set being provided with heating.

means to diffuse the moisture evenly through out the web. v

3. The combination of means for supporting a web of paper in the form ofa supply roll, a pair of longitudinally corrugating rolls to which thepaper is directly led from the supply roll, and means between the sup-vply roll and the corrugating rolls for wetting the paper sufliciently'to cause it to become plastic and stretchable, "rolls forming;

part of a set of pairs of corrugatingrolls through which the paper isled, one ofthe rolls in said set being provided with heating means todiffuse the moisture evenly throughout the web, and another of saidrolls being provided with heating means to aid in drying the paper.

4. The combination of means for supporting a web in the form of asupplyroll, a

pair of corrugating rolls to which said web is directly led, meansbetween said corrugating rolls and supply roll for wettin the paper, andmeans for transversely cri'n (ling the corrugated web.

5. v The combination offmeans for supporting a web of paper in. the.form ofa supply roll, a pair of longitudinally;corrugating rolls towhich the paper is directly led from the supply roll, means-between thesupply roll and the corrugating rolls for wetting i the papersufiiciently to cause it to become plastic and stretchable, saidcorrugating rolls being formed to stretch the paper lat-- erally whilerolling wide corrugations therein,band means for crinklingthe corrugatedwe 6. The combination with means for supporting a supply roll, ofcorrugating rolls for rolling wide corrugations in the paper andincidentally stretching the same, wetting rolls upon opposite sides ofthe webbetween the corrugating rolls, and supply roll, :and mciians forsupplying water to said wetting ro s. v- I 7, The Combination with meansfor supporting a supply roll, of corrugating'rolls for rolling .widecorrugations in the paper and incidentally stretching the same, wettingrolls upon opposite sides of the web be.-

- tween the, corrugating rolls and supply roll,

and means for supplying water to said wet"- ting rolls, saidwater-supplying means com prising troughs and rolls immersed in thetroughs and running in contact with the said wetting rolls. 4

the paper.

Gil

vcrsely.

8. The combination with means for an porting a s upply roll,,ofcorrugating r01 3 for, rolling'wide corrugations in the paper andincidentally vstretching the same, wetting rolls upon opposite 'sidesoif the web between the corrugating rolls and suppl roll, and means forsupplying water-to said wetting rolls, means being providediorregulating the pressure of the wetting rolls against the paper tofurther corrugating action, and

means to crinkle the paper transversely. H 11. The-combination with,means .t0 ,supply paper, of meansto wet the paper, two

' rolls between which the wet paper is corrugatedand incidentallystretched, a third roll to co-operate with one of said rolls to subjectthe aper to further corrugating action,

and a ourth roll to co-operate with the third roll in still furtherrolling the corru gations in the paper.

12. The combination with means tosupply paper, of means towet the paper,*two rolls between which the wet paper is corrugated andincidentally stretched, athird roll ,to cooperate with one of said rollsto'subject the paper to further corrugating action, a fourth roll toco-operate with the third roll in still further" rolling thecorrugations in the paper, and means for co operat ing with said fourthroll to crinkle the paper trans- 13. The combination with means tosupp'ly a webof paper, of means to wet the paper, first and second rollsbetween which the wet paper is corrugated longitudinally of the web andincidentally stretched transversely, a, third .roll( to co-operate withone of said rolls to subject the paper to further corrugatin g. action,said second roll being in the formof a drum, and means to 'heat thedrum. i

14.The combination with means to'supply a web of aper, of means ito wetthe paper, first an second rolls between which the wet paper iscorrugated longitudinally -'of the web and incidentally stretchedtransversely, and a third roll to co-operate with one of said rolls tosubject the paper tov further corrugating action, said second and "thirdrolls being in the form of drums, and

both'beingjprovided with heating means.

' 15. In a paper-crinkling machine, the combination with a cylinder anda doctor blade or device to co-operate therewith. of

a pressure roll or device to hold the paper against the c linder in the.vicinity of the doctor-bla e, and means to adjust said. roll towards andaway from the doctorblade.

16:11: a paper-crinkling machine, the combination with a cylinder and adoctor.- blade or device to co-operatetherewith, of a pressure roll, ordevice to hold the paper against the cylinder in' the vicinity; of

the doctor-blade, and means operatively connected to said cylinder formoving said roll towards and away fiom the doctor-blade.

17. In a- 'paper-crinkling machine, the combination with a cylinder andadoctorblade or device to co-operate therewith, of

a pressure roll or device tohold the paper against the. cylinder in thevicinity of the doctor-blade, and revoluble cam mechanism connected-tosaid cylinder to move said roll towards and away from the doctorblade;

18. In aicrinlrling machine, the combina tion with a cylinder, adoctor-blade, and a roll' to pre:s thepaper against the cylinder in thevicinity of the doctor-blade, of means for automatically effectingvariations in the relationship of the roll, doctor-blade and linder. l9.The combination of means for supporting a web ofrpaper'inthe form of asupply roll, a set of longitudinal-1y corrugating rolls to which thepaper is directly led from the supply roll, means between the supplyroll and the corrugating rolls for wetting the paper-sufiiciently tocause it to become plastic and stretchable, said corrugating rolls beingformed to stretch the paper la'terally while the rolling widecorrugations therein, a doctor blade to' co-operate with the final rollto crinkle the web, and a corrugated or grooved roll to run upon saidfinal roll in the vicinity of the doctor-blade.

20. The combination of means for supportin" a web of paper in the formof a supply ro a set of longitudinally corrugating rolls to which thepaper is directly led from the therein, a doctor-blade to co-operatewith" the final roll to crinkle the web, and a corrugated or groovedroll to run upon said final roll in the vicinity of the doctor-blade,the last-mentioned roll provided with means whereby it may be adjustedtowards and from the doctor-blade. I 7

2L In a crinkling machine, the combination of a cylinder, adoctor-blade, a roll to press the paper against the cylinder in thevicinity of the doctor-blade, arms whereon said roll is journaled, saidarms'mounted to rock upon. the axis of said cylinder, and meansctorocksaid arms. I

' 22. In a crinkling machine, the combination ofa cylinder, adoctor-blade, a roll to vicinity of t e doctor-blade, arms. whereon saidroll is journaled, saidarms mounted to rock upon theaxis of saidcylinder, a powerdriven cam to rock saidarms in one direction, and aspring to return them;

The combination with a' set of elements co-operating to crinkle a sheettransversely, of, mechanism for automatically effecting variations insaid set of elements, to secure a regular variation in thecharacteristics of the crinkling. 7 '24. The combination with means forcorrugating a web longitudinally, a set of elements including aoctor-blade, a corrugating crinkling cylinder, and a pressure roll forproducing zigzag crinkling transversely of the Web, of mechanism forautomatically deflecting variations in saidsetof elements, to secure aregular variation in the characteristics of the crinkling.

L AM AQLORENIZI.

press' the pa er against the cylinder in the

